Mechanical movement.



No. 875,180. PATB'NTED DEC. 31, 1907.

' M. JOHN.

MECHANICAL MOVEMENT.

APPLIGATION FILED APR.15.1907.

3% (ii 1/ v UNTTE 1 MATHIAS JOHN, OF MILWAUKEE, WISCONSIN.

MECHANICAL MOVEMENT.

Specification of Letters Patent.

Patented Dec. 31, 1907.

Application filed April 15, 1907. Serial No. 368,149.

To all whom it may concern:

Be it known that I, MATnrAs JOHN, a citizen of the United States, and resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Mechanical Movements; and I do hereby declare that the following is a full, clear, and exact description thereof.

The improvements consist in what is here in shown, described and claimed; the object of the invention being to provide simple eco nomical means for converting continuous rotary motion into reciprocating rotary movement, the same being especially designed for operating the agitator of a washing-machine 'but adapted to other uses.

Figure 1 of the accompanying drawings represents a plan view of my improved mechanical movement partly in horizontal section; Fig. 2, an elevation of same partly in section,'and Fig. 3, a section view of a fragment of the movement indicated by line 33 in Fig. 1.

Referring by letter to the drawings, A indicates a shaft and B a segmental rack-plate having a forked-end straddling said shaft to which it is connected by a pivot b to have rocking play. Meshing with the rack-plate is a pinion O fast on another shaft D at a right-angle to the one aforesaid and having its inner end extended beyond the pinion to be in the path of a guard-yoke E, that preferably consists of a suitably bent wire fastened at its ends in apertures of the rackplate adjacent to the forked end of same.

The rack-plate is preferably beveled in opposite directions as shown at c to economize space and provide for shaft clearance, but other suitable provision maybe had for rocking clearance of said plate in pivotal connection with said shaft, and while the yoke' end of the aforesaid plate is herein shown as designed for connection with a squared portion of a shaft,it may be as readily designed for connection with a round portion of such a device. The spaces between rack-teeth of the plate B are openings in said plate and said teeth are preferably rounded.

The wire guard yoke E herein shown is partly on opposite sides of the rack-plate, a portion of same being approximately concentric with said plate parallel thereto back of the rack portion thereof and other portions of said yoke are approximately semicircular opposite the radial edges of the aforesaid plate, to which plate the ends of the aforesaid yoke are at angles.

In practice, the drive-shaft D and pinion therewith have continuous rotary motion in one direction, said pinion being always in mesh with the rack-plate, as the result of the intermittent opposition of the yoke E to the inner end of said shaft. As a result of the operation of the drive-shaft, as aforesaid, the sides of the rack-plate B are alternately opposed to the pinion O in mesh therewith whereby the driven shaft A has reciprocating rotary movement imparted thereto, the engagement of the inner end of the drive-shaft D with the yoke E preventing disengagement of said rack-plate and pinion.

At about the time either radial edge of the rack-plate B 'would otherwise clear the pinion C, said plate is rocked on its pivot, as the result of the contact of the inner end of the shaft D with the yoke E, whereby continued engagement of the rack-and-pinion is insured and the automatic rock of said plate permitted. That portion of the yoke E approximately concentric with the plate B (back of the rack-portion of same) limits downward rock of said plate and the semicircular portions of said yoke limit the rotary movement of the aforesaid plate to such an extent as would permit the same to at any time clear'the pinion C by which it is engaged.

I claim:

1. The combination of a driven shaft and a drive-shaft at a right-angle to each other, a segmental rack-plate in pivotal connection with the driven shaft and having open spaces between its teeth, a pinion fast on the driveshaft in mesh with the rack portion of the plate, and a wire fastened at its ends to said plate to constitute a guard-yoke in opposition to an end of the drive-shaft extending inward beyond the pinion, a portion of the a pinion fast on the drive the raok-portion of the yoke in connection with said plate to oppose an end of said drive-shaft extending inward 5 beyond the pinion.

In testimony that I claim the foregoing I have hereunto set my hand at Milwaukee, in

MATH. J OHN Witnesses GEORGE FELBER, N. E. OLIPHANT. 

